Sorry for the language difference, you don't have to pay attention to other things, just focus on what I describe. This is a simple student management program. .
I have used do while to keep the program from exiting, but I don't understand why it still stops automatically.
If you choose case 9 and insert any number ( you should enter a number ) you will see the program automatically stop . Apparently there's no exit command there
.I just want to ask if it is due to data conflicts I would really appreciate it if I could get some help
#include"stdio.h"
#include"stdlib.h"
#include"string.h"
#include"math.h"
struct ct {
int id;
char name[100]="";
int people;
int v1;
int v2;
};
void sys(){
char g[50];
fflush(stdin);
printf("\n\nBan co muon ket thuc ngay lap tuc : ");
fgets(g,sizeof(g),stdin);
if(g[0]=='Y'&&g[1]=='E'&&g[2]=='S'){
exit(0);
}
}
void cntt(){
printf(" _._ _,-'""`-._ \n");
printf(" (,-.`._,'( |\`-/| \n");
printf(" `-.-' \ )-`( , o o) \n");
printf(" `- \`_`""_ \n");
}
int rate1(ct city[],int i){ // tinh ty le mui 1
float t;
float y=float(city[i].people)/100;
t=float(city[i].v1)/y;
return t;
}
int rate12(ct city[],int i){
float rate ;
float add12 = float(city[i].v1)+city[i].v2;
float one = float( city[i].people)/100;
rate = add12/one;
return rate;
}
void print(){
printf("%5s %10s %10s %10s %10s %10s %10s","STT","Ma","Ten","So dan","Mui 1","Mui 2","Ti Le(%)");
printf("\n");
}
void out(ct city[],int i,int h){ //xuat : chuc nang chinh
float g;
g=rate12(city,i);
printf("%5d %10d %10s %10d %10d %10d %10.2f",h,city[i].id,city[i].name,city[i].people,city[i].v1,city[i].v2,g);
printf("\n");
}
void out2(ct city[],int i,int h){ //xuat : chuc nang v1
float g;
g=rate1(city,i);
printf("%5d %10d %10s %10d %10d %10d %10.2f",h,city[i].id,city[i].name,city[i].people,city[i].v1,city[i].v2,g);
printf("\n");
}
void del_n(char x[]){
size_t g=strlen(x);
if(x[g-1]=='\n'){
x[g-1]='\0';
}
}
void input (ct city[],int n){
for(int i=0;i<n;i++){
printf(" Nhap ma thanh pho : ");
scanf("%d",&city[i].id);
printf(" Nhap ten thanh pho : ");
fflush(stdin);
fgets(city[i].name,sizeof(city[i].name),stdin);
del_n(city[i].name);
do{
printf(" Nhap so dan cu : ");
scanf("%d",&city[i].people);
if(city[i].people<0){
printf(" So dan cu phai lon hon 0");
}
}while(city[i].people<0);
do{
printf(" Nhap so luong mui tiem 1 : ");
scanf("%d",&city[i].v1);
if(city[i].v1>city[i].people){
printf(" So mui tiem khong duoc vuot qua so dan cu");
}
}while(city[i].v1>city[i].people);
do{
printf(" Nhap so luong mui tiem 2 : ");
scanf("%d",&city[i].v2);
if(city[i].v2>city[i].v1){
printf(" So luong mui tiem 2 phai nho hon mui 1 ");
}
}while(city[i].v2>city[i].v1);
}
}
void print1(){
printf("%5s %10s %10s %10s %10s %10s ","STT","Ma","Ten","So dan","Mui 1","Mui 2");
printf("\n");
}
void out1(ct city[],int i){
float g;
g=rate12(city,i);
printf("%5d %10d %10s %10d %10d %10d",i+1,city[i].id,city[i].name,city[i].people,city[i].v1,city[i].v2);
printf("\n");
}
void output (ct city[],int n){
printf("\n");
print1();
for(int i=0;i<n;i++){
out1(city,i);
}
}
void swap(ct &city,ct &city2){
ct temp;
temp=city;
city=city2;
city2=temp;
}
void maxToMin12(ct city[],int n){
for(int i=0;i<n-1;i++){
for(int j=i+1;j<n;j++){
if(rate12(city,i)<rate12(city,j)){
swap(city[i],city[j]);
}
}
}
}
void topN12(ct city[],int n){
int t;
do{
printf("\nNhap top can kiem tra so luong tiem ca 2 mui : ");
scanf("%d",&t);
if(t>n){
printf("So top khong duoc lon hon so thanh pho kiem tra ");
}
}while(t>n);
maxToMin12(city,n);
int h=1;
printf("\n");
print();
for(int i=0;i<t;i++){
out(city,i,h);
if(rate12(city,i)!=rate12(city,i+1)){
h++;
}
}
}
void maxToMin12up(ct city[],int n){ //top 12 tang dan
for(int i=0;i<n-1;i++){
for(int j=i+1;j<n;j++){
if(rate12(city,i)>rate12(city,j)){
swap(city[i],city[j]);
}
}
}
}
void topN12up(ct city[],int n){ //top 12 tang dan
int t;
do{
printf("\nNhap top can kiem tra so luong tiem ca 2 mui : ");
scanf("%d",&t);
if(t>n){
printf("So top khong duoc lon hon so thanh pho kiem tra ");
}
}while(t>n);
maxToMin12up(city,n);
int h=1;
printf("\n");
print();
for(int i=0;i<t;i++){
out(city,i,h);
if(rate12(city,i)!=rate12(city,i+1)){
h++;
}
}
}
void v1(ct city[],int n){ // xep theo ty le mui 1 giam dan
for(int i=0;i<n;i++){
for(int j=i+1;j<n;j++){
if(rate1(city,i)<rate1(city,j)){
swap(city[i],city[j]);
}
}
}
int h=1;
print();
for(int i=0;i<n;i++){
out2(city,i,h);
if(rate1(city,i)!=rate1(city,i+1)){
h++;
}
}
}
void v1up(ct city[],int n){ // xep theo ty le mui 1 tang dan
for(int i=0;i<n;i++){
for(int j=i+1;j<n;j++){
if(rate1(city,i)>rate1(city,j)){
swap(city[i],city[j]);
}
}
}
int h=1;
print();
for(int i=0;i<n;i++){
out2(city,i,h);
if(rate1(city,i)!=rate1(city,i+1)){
h++;
}
}
}
void changeV1(ct city[],int n){
int x;
int dem=0;
int z;
do{
printf("Nhap ma thanh pho can thay doi : ");
scanf("%d",&x);
for(int i=0;i<n;i++){
if(x==city[i].id){
dem++;
z=i;
}
}
if(dem==0){
printf("Khong co ma thanh pho nay \n");
}
}while(dem==0);
printf("Nhap so mui tiem 1 can thay doi cua thanh pho %s : ",city[z].name);
scanf("%d",&city[z].v1);
}
void changeV2(ct city[],int n){
int x;
int dem=0;
int z;
do{
printf("Nhap ma thanh pho can thay doi : ");
scanf("%d",&x);
for(int i=0;i<n;i++){
if(x==city[i].id){
dem++;
z=i;
}
}
if(dem==0){
printf("Khong co ma thanh pho nay \n");
}
}while(dem==0);
printf("Nhap so mui tiem 2 can thay doi cua thanh pho %s : ",city[z].name);
scanf("%d",&city[z].v2);
}
void addCity (ct city[],int &n){
int i=n;
n=n+1;
printf(" Nhap ma thanh pho : ");
scanf("%d",&city[i].id);
printf(" Nhap ten thanh pho : ");
fflush(stdin);
fgets(city[i].name,sizeof(city[i].name),stdin);
del_n(city[i].name);
/*
do{
printf(" Nhap so dan cu : ");
scanf("%d",&city[i].people);
if(city[i].people<0){
printf(" So dan cu phai lon hon 0");
}
}while(city[i].people<0);
do{
printf(" Nhap so luong mui tiem 1 : ");
scanf("%d",&city[i].v1);
if(city[i].v1>city[i].people){
printf(" So mui tiem khong duoc vuot qua so dan cu");
}
}while(city[i].v1>city[i].people);
do{
printf(" Nhap so luong mui tiem 2 : ");
scanf("%d",&city[i].v2);
if(city[i].v2>city[i].v1){
printf(" So luong mui tiem 2 phai nho hon mui 1 ");
}
}while(city[i].v2>city[i].v1);
*/
}
void deleteCity (ct city[],int &n){
int x;
int dem=0;
int z;
do{
printf("Nhap ma thanh pho can xoa : ");
scanf("%d",&x);
for(int i=0;i<n;i++){
if(x==city[i].id){
dem++;
z=i;
}
}
if(dem==0){
printf("Khong co ma thanh pho nay \n");
}
}while(dem==0);
for(int i=z;i<n;i++){
city[i]=city[i+1];
}
n--;
}
int main(){
ct *city;
int n;
char y=3;
printf("Input number : ");
scanf("%d",&n);
city=(ct*)malloc(sizeof(ct)*n);
int v;
do{
system("cls");
cntt();
printf(" * * * * * * * * * * * * * * * * * * * * * * * * * *\n");
printf(" * MENU %c%c%c *\n",y,y,y);
printf(" * 1.Nhap thong tin tinh thanh pho *\n");
printf(" * 2.Xuat thong tin tinh thanh pho *\n");
printf(" * 3.Xac dinh top N thanh pho co ty *\n");
printf(" * le tiem 2 mui cao nhat *\n");
printf(" * 4.Xac dinh top N thanh pho co ty *\n");
printf(" * le tiem 2 mui thap nhat *\n");
printf(" * 5.Sap xep cac thanh pho theo ty *\n");
printf(" * le tiem mui 1 giam dan *\n");
printf(" * 6.Sap xep cac thanh pho theo ty *\n");
printf(" * le tiem mui 1 tang dan *\n");
printf(" * 7.Thay doi so mui 1 vacxin *\n");
printf(" * 8.Thay doi so mui 2 vacxin *\n");
printf(" * 9.Them thanh pho *\n");
printf(" * 10.Xoa thanh pho *\n");
printf(" * 11.Ket thuc chuong trinh *\n");
printf(" Lua chon cua ban : ");
scanf("%d",&v);
switch (v){
case 1:
fflush(stdin);
printf("Nhap thong tin thanh pho\n");
input(city,n);
sys();
break;
case 2:
output(city,n);
sys();
break;
case 3:
topN12(city,n);
sys();
break;
case 4:
topN12up(city,n);
sys();
break;
case 5:
v1(city,n);
sys();
break;
case 6:
v1up(city,n);
sys();
break;
case 7:
changeV1(city,n);
sys();
break;
case 8:
changeV2(city,n);
sys();
break;
case 9:
addCity(city,n);
sys();
break;
case 10:
deleteCity(city,n);
sys();
break;
case 11:
printf("\nThanks");
exit(0);
default:
printf("\n\n\n ******************************************************\n");
printf(" ** Hay nhap dung ky tu **\n");
printf(" ******************************************************\n\n\n");
sys();
}
}while(v!=11);
free(city);
}
